Cutter for needles.



K. J. PEERS.

CUTTER FOR NEEDLES. APPLICATION FILED 05c. 29. m3.

WITHEEE: IHVEIJTEIR:

COLUMBIA PLANOURAPH c0.. WASHINGTON, D. C.

nsrnn J. rnnns, or Bos'rou, nassecnusnrrs.

GUTTEB FOR EEDLES.

Application filed December 29, 1913.

To all whom it may concern Be it known that I, Knsrnn J. Pnnns, a resident of Boston, in the county of Suffolk and State of Massachusetts, a subject of George V, King of Great Britain and Treland, have invented a new and useful Improvement in Cutters for Needles, oi which the following is a specification.

My invention relates to a cutter adapted for trimming the points of fiber needles, such as are often used with talking machines, and it combines a blade for shaving the end of the needle with a stop by which the amount of material to be cut from the end of the needle is gaged.

My device also provides means whereby the point of the needle is kept from being jammed during the cutting operation in that the edge or corner which becomes the point as the needle is repeatedly shaved, is protected.

. My invention will be understood by reference to the drawings, in which Figure l is a side elevation of a cutter embodying my invention in its closed position. Fig. 2 is a similar elevation showing the position of the cutter after it has trimmed the needle. Fig. 3 is a top view of the cutter when in closed position. Figs. 4; and 5 are the two sides of the work support. Fig. 6 is a section on the line 6-6 of Fig. 3, and Fig. 7 is a perspective view of one of the needles. 7

The essentials of a cutter of this character are that it shall receive and hold the needle in such a position. that a minute shaving shall be cut from its end and the point be of proper character, and this requires that the needle shall be fed to the cutter a predetermined distance and in a predetermined direction, and that it shall be held in such position during the slicing oil of the shaving. Moreover, as the needles now in use are usually made of bamboo or other tough fibrous material, and as it requires considerable strength to force the cutter through the material, there will be danger of jamming the needle against any surface toward which the cutter presses it during the cutting operation, injuring the edge which constitutes the point as the needle is shaved and consequently the character of the point. Provision is made in my device to prevent this trouble.

In the drawings: A is the cutter lever and B is the work holder. These levers are piv- Specification of Letters Patent.

Patented Nov. 23, 1915.

Serial No. 809,207.

oted together at a and their lower ends spread forming handles providing a space for the spring C. This spring is attached at 0 to the handle of the lever 13, its other end being capable of sliding in a groove 0 in the handle of the lever A. This'spring keeps the parts normally in the position shown in Fig. 1, but allows them to be compressed'together to cause the cutting operation as shown in Fig. 2. j

The upperend of the lever A is bent outward as at A and to it is attached the blade D, this blade lying between the part A of the lever A and the upper part of the lever B. The lever B carries on its upward end and forming a part of it the work support which may be in whole or in part of steel to cooperate with the blade 1). The blade D is made of hard steel and comprises a cutting edge al and a stop (Z To form this stop the blade D is thinned slightly at a point opposite the opening a in the work holder. The blade D is also provided with a slot d so that the screw 6 which passes through this slot and into the work holder E may guide the blade I).

The work support has a projection E from its outer side which projection carries a groove 6 which is shaped in cross section to receive the needle F. The needle isshown in Fig. 7., In using these needles in the manner which is customary the point f which is to travel over the record is formed upon one of the edges of the outer surface or skin of the bamboo section and the groove 6 is shaped to receive the needle with this outer surface upward. The point is pushed by hand through the opening 6 in the work holder and against the portion d of the blade D, which acts as a stop as above described, so that a minute predetermined portion of the end of the needle extends into the path of the knife blade. The opening 6 in the work holder is substantially triangular in shape as shown and is large enough to allow the needle to be projected at an angle through it. The side 6 of the opening, however, is longer than would be necessary to subtend the angle between the side 6 and the third side and the side 6 is not straight, but is diverted outwardly somewhat and finally joins the side 6 thus forming a recess in that corner of the opening. The needle on the contrary is triangular in cross section. By shaping the side 6 as shown, that is, making it straight for most of its V any pressure or contact.

length, thendiverting it as shown, a recess is formed such that the adjacent angular edge of the needle at the extremityof which is the point, will not touch the side 6 although the needle as a whole will be firmly held during the cutting operation. Thus the point or the edge which later becomes the point, cannot be jammed no matter how much pressure is required in operating the knife. The tendency of the knife is to drive the needle into this corner and if this openingbe a perfect triangle it will be seen that the needle willbe held firmly on all sides, and hence will be compressed and the point edge marred and injured by such pressure.

Innsing my device, the cutter being in the position shown'in Fig. 1, theneedle is placed-in the groove 6 with its skin side up and is pressed against the stopsurface d of the blade D and is held there with the finger. .The handles of the levers A and B are then brought together as in Fig. '2, thus causing a minute slice to be taken off the end of the needle. It will be seen that during this operation the end ofthe needleor a portion of it is always against the blade D, first resting against the portion d until the blade has begun to cut and then against the cutting portion of the blade itself.

I do not mean to limit myself to the precise form of my invention shown in the 'VVhat I claim as my invention is 1. In a. device'of. the kind described, a .work holder comprising a plate having an opening therethrough and a work support 1n alinement with said opening, and a blade memberhaving a cutting edge, and means for supporting said work holder in opposite relation to said blade, and means for Copies of this patent may be obtained for moving one with relation to the other whereby said blade may slide across said opening and in contact with said work support to perform its cutting operation, said opening being in outline approximately the shape of the section to be cut from the work by said blade, but having a slight recess at the end opposite that at which the blade begins its traverse of said opening.

2. In a device of the kind described, two levers pivoted together, two of the adjacent ends of said levers normally overlapping, the said end of one lever carrying a work holder rigidly attached thereto, the said end of the other lever having a blade pivotally attached thereto, said blade and said work holder being movably connected whereby upon their rotative movement said blade will be caused to slide across the face of said work holder.

3. In a device of the kind described, two levers pivoted together, two of the adjacent ends of said levers normally overlapping, the said end of one lever carrying a work holder rigidly attached thereto, the said end of the other lever having a blade pivotally attached thereto, said blade and said work holder being movably connected, said work holder having an opening and a work support registering therewith and adapted to hold the work in the path of the knife blade, and said connection between said work holder and said blade being adapted to cause said blade to out a slice off the end of said work.

4. A device of the kind described comprising a work holder and a blade member, an opening in said work holder to receive a needle triangular in cross section and hold it against the cutting action of said blade member, said opening being substantially triangular in cross section but having at the corner against which the cutting blade presses the needle during the cutting operation a recess, and means for moving said blade member and said work holder into relation to each other whereby the end of the needle may be sheared as described.

. KESTER J. PEERS. Witnesses:

GEORGE O. G. COALE, M. E. FLAI-IERTY.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

